Improvement in skiving-machines



G. E. LANGMAID. Ski'ving-Machine.

No. 220,847. Patented Oct. 21,1879.

WITNESSES: 2215mm @L W Y M owns;

UNITED STATES PATENT OFFICE.

CHARLES E. LANGMAID, OF STONEHAM, MASSACHUSETTS, ASSIGNOR TO HIMSELF ANDGEORGE A. LANGMAID, OF MECHANICS FALLS, MAINE.

IMPROVEMENT IN SKlVlNG-MACHINES.

Specification forming part of Letters Patent No. 220,847, dated October21, 1879; application filed March 11, 1879..

counters, and other work of a similar character. The invention consistsin a vibrating knife that is hung upon the bed, and used in connectionwith the usual clamps or rolls for feeding the materiahand operated bymechanism as hereinafter described, whereby the cutting is done withgreater facility than heretofore, and the machine may be used for thefinest work.

The machine is shown in the accompanying drawings, wherein Figure 1 is aside elevation, partially in section. Fig. 2 is a plan view. Fig. 3 isan end view.

Similar letters'of reference indicate corresponding parts.

a represents the support for the horizontal shafts b c of the feedrollsd d, which parts are of usual character. The upper roll, (1, will befitted for adjustment to and from the roll d! and feeding-bed e, and iskept down to its work by a spring, f, arranged in any desired manner. 7u

The knife 1 is fitted upon bed 0 at the delivery side of the rollers.This knife is pivoted to e by a pin or screw, 27, that serves as afulcrum on which the knife may vibrate horizontally and in a directionat right angles to the feed of the material.

The knife is operated by rod it, that is con nected to it, and passes toa crank-wheel, it, upon a worm-shaft, l, which is driven by a belt orother connection to the pulley m on shaft 1.

The worm l operates the worm-wheel a on the lower feeding-shaft, a,which shaft 0 also carries a gear, 0, that meshes with gear 19 on theupper feeding-shaft, b. By this construction the knife and feed-rollsare-simultaneously operated by power applied to pulley m, and the knifehas a rapid vibration in comparison with the speed of rollers cl 61.

As the work is pressed up to the cuttingedge the knife, by itsvibration, will act with a shearing cut, and with great ease andfreedom. This action permits the material to pass through evenly, andadapts the machine for fine work.

The rolls will be self-adjusting for different thicknesses of material.

The knife g is shown as formed with a slightlycurved cuttingedge; but Ido not limit myself in that particular, nor to the described manner ofhanging the knife.

The knife will preferably be formed wider in proportion than astationary knife for the same work.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. The combination, with the feed-rollers or clamps dd, of the vihratin g knife g, hung upon the bed 0, and operated by therod h, substantially as described and shown, and for the purposesspecified.

2. In a skivin g-machine, the combination and arrangement, with thevibrating knife 9 and feed-roll shafts b c, of the rod h, crank k,wormshaft 1, worm-wheel a, gears o p, and driving- .pulley m, as and forthe purposes specified.

CHARLES E. LANGMAID.

Witnesses:

AMos HILL, Amuen A. PLATTS.

